Going from 2 AGM to 1 12V 300Ah LiFePO4 Battery

[Chateau_Nomad]

Awesome!!! You're gonna be a HAPPY CAMPER!!

 

[dkoldman]

Thanks All!View attachment 1320861View attachment 1320862
Update batteries came today at 1pm.
The bim reversed was interesting.
I think I understand why reversed.
The wire harness that contains the chassis & coach battery wires is really secured but the chassis battery wire is 1 inch short to reach BAT A on the bim 160. The chassis battery fits fine on li bim 225 chassis labeled connection. However the coach is short by 2 inches to reach the li bim coach connection.

I ran to autozone and bought a battery wire & screws. Connected to coach harness wire and then to li bim 225.

Multimeter showed 12.8 on li bim 225 chassis & 0 on coach.

Tried to drop lithium 300 in and off width wise by about 1/8 inch. I bent the metal on the step down a little and dropped battery in on an angle. It was hanging at the bottom off the holding metal plate. Moved it front to back and dropped perfectly in the holding plate.

Hooked up battery wires.

Battery showed 73% delivered.

Tested li bim 225. Chassis 12.7 coach 13.1.

Turned on use store. Booted bmpro.
Bmpro shows coach 13.1 & chassis 12.7

Lights work. Solar blinking fine.
After 2 hours reading on actual coach shows 82% vs delivered 73%.

Left as is to see what solar does.

Will plug in 30 amp test tomorrow.

This is great, and well done. Somebody got to work today.

My questions, do you have a picture of how you connected the auto zone cable that was too short? Did you replace the entire cable or connect it to existing one? If it was the latter, I just wish to ensure you have that positive connection sealed.

It is normal to not ship a lithium battery fully charged, because they do not store them will full charges.

You are going to see a dramatic difference from the AGMs. Incredible to about 270 ah that you can actually use. Solar will become a 2nd thought for you soon. it is ok toy, but until we are talking ACs it is really not needed unless you have bad batteries. If the later buy a new battery not more panels.

 

[dkoldman]

I am looking at the clouds saying thanks

ok is it safe for me to send the dogs back to New Mexico

 

[16ACE27]

I am looking at the clouds saying thanks

Congratulations on a job well done!

Now to test the back and forth charging is working as it's supposed to.

 

[Scubawise]

Also they only give you 10 days to contact for warranty and get 10 years!

 

[Scubawise]

ok is it safe for me to send the dogs back to New Mexico

Not yet. Camping July 4th. Dry for 5 days

 

[Scubawise]

This is great, and well done. Somebody got to work today.

My questions, do you have a picture of how you connected the auto zone cable that was too short? Did you replace the entire cable or connect it to existing one? If it was the latter, I just wish to ensure you have that positive connection sealed.

It is normal to not ship a lithium battery fully charged, because they do not store them will full charges.

You are going to see a dramatic difference from the AGMs. Incredible to about 270 ah that you can actually use. Solar will become a 2nd thought for you soon. it is ok toy, but until we are talking ACs it is really not needed unless you have bad batteries. If the later buy a new battery not more panels.

Great advice. Used auto cable with flat end with hole connected to coach with autozone screw bolt. Wrapped in electrical tape. The other flat end put on li bim 225 coach side. It is 10 inches so wrapped and zip tied to other wires.

 

[Scubawise]

Congratulations on a job well done!

Now to test the back and forth charging is working as it's supposed to.

Yes dry camping July 4th. Will plug in my 30 amp to test tomorrow. Will drive to test alternator charging.

 

[Scubawise]

This is great, and well done. Somebody got to work today.

My questions, do you have a picture of how you connected the auto zone cable that was too short? Did you replace the entire cable or connect it to existing one? If it was the latter, I just wish to ensure you have that positive connection sealed.

It is normal to not ship a lithium battery fully charged, because they do not store them will full charges.

You are going to see a dramatic difference from the AGMs. Incredible to about 270 ah that you can actually use. Solar will become a 2nd thought for you soon. it is ok toy, but until we are talking ACs it is really not needed unless you have bad batteries. If the later buy a new battery not more panels.

Here is black autozone cable looped down on coach wire with tape. I folded (very flexible) & zip tied. Tested with multimeter

 

[Scubawise]

Thanks for choosing our battery!

We have received your warranty activation apply and we have registered your information. Since you contacted us within ten days of delivery for the parcel, the warranty period for your order is from Jun 19 , 2025 to Jun 19 , 2035, which is 10 years. During the warranty period, if you have any problems with your battery, you can contact us directly.

Thanks again for your support of our batteries.
Have a great day!

Lynn
Customer Service Specialist

 

[happy-THOR]

Thank you for making this post.
Good job!

PS: if you have to get warranty service, and contact them directly, is it by phone?
Do they have a US office?

 

[Scubawise]

Thank you for making this post.
Good job!

PS: if you have to get warranty service, and contact them directly, is it by phone?
Do they have a US office?

Thanks the USA division sent email

NewtiPower-Lithium Battery Manufacturer

E-mail: newtipowerservice@outlook.com
Newtipower Official Website: www.newtipowervip.com

 

[Scubawise]

Test1:

12V 300Ah Small-Volume LiFePO4 Lithium Battery,200A BMS,10000+ Deep Cycle Lithium Iron Phosphate Battery Great for Winter Power Shortage, RV, Marine and Off Grid Applications​

180 watt solar active. Battery still at 82% as was yesterday. No shore power.

Started engine. Ran 5 minutes.
Bmpro & actual battery reading attached.
Started inverter. Started fine.
Now letting things settle to plug in 30 amp SP.

 

[Scubawise]

Test2:

12V 300Ah Small-Volume LiFePO4 Lithium Battery,200A BMS,10000+ Deep Cycle Lithium Iron Phosphate Battery Great for Winter Power Shortage, RV, Marine and Off Grid Applications​

Waited 10 minutes for things to settle.
No SP.
Bmpro & actual battery reading

 

[Scubawise]

Test3
Now plugged into 30amp

 

[Scubawise]

Test 4
Plugged in 30 amp for 2 hours
Bmpro & battery

 

[Scubawise]

Sold 2 4 year old vmax agm 125 ah batteries for $220.
Good deal new 300 ah lithium now cost $107.

 

[jawzilla]

Test2:

12V 300Ah Small-Volume LiFePO4 Lithium Battery,200A BMS,10000+ Deep Cycle Lithium Iron Phosphate Battery Great for Winter Power Shortage, RV, Marine and Off Grid Applications​

Waited 10 minutes for things to settle.
No SP.
Bmpro & actual battery reading

What does L8 mean on the battery?

 

[jawzilla]

I think your reading it upside down. L8= 87%.

 

[Mark54]

Test 4
Plugged in 30 amp for 2 hours
Bmpro & battery

BMPro is not communicating well- shows 13.2V= 70% SOC, and battery shows 94%.
Also I see the BMPro is not 'lit up' so not sure it's up to date yet- takes a few minutes for it to wake up when you tap the screen.
Good thing the battery has that display- i trust that more.
I may have missed it, but did you move the batteries up inside the 20A?
Nice looking battery!